[syn: amusing, comic, comical, funny, laughable, mirthful, risible]
The Collaborative International Dictionary of English v.0.48:
Laughable \Laugh"a*ble\, a.
   Fitted to excite laughter; as, a laughable story; a laughable
   scene.
   [1913 Webster]
   Syn: Droll; ludicrous; mirthful; comical. See Droll, and
        Ludicrous.
        [1913 Webster] -- Laugh"a*ble*ness, n. --
        Laugh"a*bly, adv.
        [1913 Webster]
WordNet (r) 3.0 (2006):
laughable
    adj 1: incongruous;inviting ridicule; "the absurd excuse that
           the dog ate his homework"; "that's a cockeyed idea"; "ask
           a nonsensical question and get a nonsensical answer"; "a
           contribution so small as to be laughable"; "it is
           ludicrous to call a cottage a mansion"; "a preposterous
           attempt to turn back the pages of history"; "her
           conceited assumption of universal interest in her rather
           dull children was ridiculous" [syn: absurd, cockeyed,
           derisory, idiotic, laughable, ludicrous,
           nonsensical, preposterous, ridiculous]
    2: arousing or provoking laughter; "an amusing film with a
       steady stream of pranks and pratfalls"; "an amusing fellow";
       "a comic hat"; "a comical look of surprise"; "funny stories
       that made everybody laugh"; "a very funny writer"; "it would
       have been laughable if it hadn't hurt so much"; "a mirthful
       experience"; "risible courtroom antics" [syn: amusing,
       comic, comical, funny, laughable, mirthful,
       risible]
Moby Thesaurus II by Grady Ward, 1.0:
36 Moby Thesaurus words for "laughable":
   absurd, amusing, beyond belief, bizarre, cockamamie, crazy, droll,
   eccentric, extravagant, fantastic, foolish, funny, grotesque,
   high-flown, hilarious, humorous, incongruous, incredible,
   ludicrous, monstrous, nonsensical, outrageous, outre, poppycockish,
   preposterous, priceless, quaint, quizzical, rich, ridiculous,
   risible, screaming, weird, whimsical, wild, witty